egg envelope
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egg membrane — any of several investments surrounding the oocyte: if derived from the oocyte itself, as the vitelline membrane, it is called primary; if from the follicular cells, as the zona pellucida, it is called secondary; if from the oviduct, as the… … Medical dictionary
egg-membrane — Internal egg envelope or lining, thin, tough, flexible and colorless … Dictionary of invertebrate zoology
egg — egg1 eggless, adj. eggy, adj. /eg/, n. 1. the roundish reproductive body produced by the female of certain animals, as birds and most reptiles, consisting of an ovum and its envelope of albumen, jelly, membranes, egg case, or shell, according to… … Universalium
Egg (biology) — Bird eggs and others (click on image for key) … Wikipedia
egg — I [[t]ɛg[/t]] n. 1) dvl the roundish reproductive body produced by the female of certain animals, as birds and most reptiles, consisting of an ovum and its envelope of albumen, jelly, membranes, egg case, or shell, according to species 2) dvl… … From formal English to slang
Egg activation — After the fusion of the sperm plasma membrane and the egg plasma membrane after fertilization, animal eggs go through a process called egg activation to prepare the egg for development.There are three functions of egg activation: # Block to… … Wikipedia
egg case — noun 1. a. or egg capsule : a protective case enclosing eggs (as of certain insects and mollusks) : ootheca see sea necklace b. or … Useful english dictionary
egg sac — the envelope enclosing the ova of a fish … Dictionary of ichthyology
Chorion (egg) — The chorion is the outermost membrane around the embryo in mammals, birds and reptiles. It develops from an outer fold on the surface of the yolk sac.[1] In insects, the chorion is the outer shell of the insect egg[1], which lies outside the… … Wikipedia
fertilization — fertilizational, adj. /ferr tl euh zay sheuhn/, n. 1. an act, process, or instance of fertilizing. 2. the state of being fertilized. 3. Biol. a. the union of male and female gametic nuclei. b. fecundation or impregnation of animals or plants. 4.… … Universalium
